Electric bulb



Jan. 17, 1928. 1,656,793

F. K. KAYTE ELECTRIC BULB Filed 001;. 27. 1924 INVENTOR ATTORNEYWITNESS:

a Jan. 17, 1928.

ll E D S l A FRANK K. KAY'EE, 01? FARR, COLORADO.

ELECTRIC BULB.

Application filed October 2?, 192%. Serial No. 746,138.

My invention relates to electric illuminating bulbs and its primaryobject is the pro vision of an illuminating bulb which will give amaximum amount of light and at the same time increase the life of thebulb to a maximum. 7

The invention also provides an illuminating bulb having a plurality offilaments each of which is in an independent circuit and so arranged asto enable one of the filaments to be brought into operation after theother has become burned out.

Still another object of the invention is to provide an illuminating bulbhaving a plurality of filaments each of which being arranged in anindependent circuit together with a novel means for including one of thefilaments in the circuit after the original filament has become burnedout. A 7

With the preceding and other objects and advantages in mind, theinvention consists in the novel combination of elements, constructionand arran ement of parts and operation, to be hereinafter specificallyreferred to, claimed and illustrated in the accompanying drawin s,wherein:

Figure 1 is a vertica sectional view of an electric lamp bulbconstructed in accordance with my invention.

Figure 2 is a horizontal sectional view taken on line 2-2 of Figure 1.

Figure 3 is a similar view taken on line 3-3 of Figure 1.

Figure 4 is a top plan view of the lamp.

Figure 5 is a perspective of the circuit closing element embodied in theinvention.

Referring to the drawings in detail wherein corresponding characters ofreference denote corresponding parts throughout the several views, thenumeral 5 designates a porcelain or other non-conducting base to whichthe lamp bulb 6 is attached. The

upper end of this lamp 6 is formed with an inwardl directed flange 7which is drawn to provide a hollow base 8 for a depend- ,ing rod 9, thelatter extending substantiall the entire length of the bulb as shown. At readedsleeve 10 is received on the base 5 and is ada ted to bethreaded in the usual socket not s own.

Filaments 11 and 12 are carried by the post 9 and each of which includesvertically extending legs 13 and 14 that pass throng the hollow base 8and are connected to plugs 15 and 16 embedded in thebase A return wire16 for the filament 11 passes transversely through the side wall of thehollow element 8 and is connected as at 17 to the sleeve 10. A similarreturn wire 18 is provided for the filament 12 and which extendsvertically through the base 5 and has one end normally disposed insemi-circular grooves 18 formed on the outer face of the base 5. When itis desired to bring this filament 12 into operation, this end of thewire 18 is connected to a laterally disposed lug 19 formed on the sleeve10.

A conducting plate 20 normally rests in a shallow recess 21 in the upperface of the ba se 5 and receives a circuit closing disk 22, the latterbeing provided with a pin or contact 23 engageable in either one of theplugs 15 and 16 to complete the circuit to either of the filaments abovementioned.

From an observance of Figure 2 it will be noted that a circuit throughthe filament 12 is shown while the circuit through the filament 11 isinterrupted as in the case when the same burns out. o

While I have shown and described the preferred embodiment of theinvention, I desire to have it understood that such changes in the form,construction and arrangement of parts may be made as will not departfrom the spirit of the invention or the scope of the subjoined claim.

What is claimed is:

An electric light comprising a bulb, a non-conducting base to which thebulb is attached, a metallic sleeve on the base, a conductor platecarried by the base, sockets embedded in the base beneath the conductorplate, the ends of said sockets being spaced inwardly from the end ofthe base, a pair of filaments, each of which has one terminal connectedwith a coresponding socket and one of which has its other terminalconnected to the sleeve, the remaining terminal being adapted to beconnected to the sleeve in the event that the filament which isterminally connected becomes inoperative, a circuit closing diskcontacting with the plate, a pin carried thereby and engageable ineither of the sockets whereb the circuit maly he completed to eitherof te filaments.

n testimony whereof I aifix my signature.

FRANK K. K i'TE.

